NSC LMV344MA Single with shutdown/dual/quad general purpose, 2.7v, rail-to-rail output, 125â°c, operational amplifier Datasheet

LMV341/LMV342/LMV344
Single with Shutdown/Dual/Quad General Purpose, 2.7V,
Rail-to-Rail Output, 125˚C, Operational Amplifiers
General Description
The LMV341/342/344 are single, dual, and quad low voltage, and low power Operational Amplifiers. They are designed specifically for low voltage portable applications.
Other important product characteristics are low input bias
current, rail-to-rail output, and wide temperature range.
The patented class AB turnaround stage significantly reduces the noise at higher frequencies, power consumption,
and offset voltage. The PMOS input stage provides the user
with ultra-low input bias current of 20fA (typical) and high
input impedance.
The industrial-plus temperature range of -40˚C to 125˚C
allows the LMV341/342/344 to accommodate a broad range
of extended environment applications. LMV341 expands National Semiconductor’s Silicon Dust™ amplifier portfolio offering enhancements in size, speed, and power savings. The
LMV341/342/344 are guaranteed to operate over the voltage
range of 2.7V to 5.0V and all have rail-to-rail output.
The LMV341 offers a shutdown pin that can be used to
disable the device. Once in shutdown mode, the supply
current is reduced to 45pA (typical). The LMV341/342/344
have 29nV Voltage Noise at 10KHz, 1MHz GBW, 1.0V/µs
Slew Rate, 0.25mVos, and 0.1µA shutdown current
(LMV341.)
The LMV341 is offered in the tiny SC70-6L package, the
LMV342 in space saving MSOP-8 and SOIC-8, and the
LMV344 in TSSOP-14 and SOIC-14. These small package
amplifiers offer an ideal solution for applications requiring
Connection Diagram
minimum PC board footprint. Applications with area constrained PC board requirements include portable electronics
such as cellular handsets and PDAs.
Features
(Typical 2.7V Supply Values;Unless Otherwise Noted)
n Guaranteed 2.7V and 5V specifications
n Input referred voltage noise (@10kHz)
29nV/
n Supply current (per amplifier)
100µA
n Gain bandwidth product
1.0MHz
n Slew rate
1.0V/µs
n Shutdown Current (LMV341)
45pA
n Turn-on time from shutdown (LMV341)
5µs
n Input bias current
20fA
Applications
n
n
n
n
n
n
n
n
n
n
Cordless/cellular phones
Laptops
PDAs
PCMCIA/Audio
Portable/battery-powered electronic equipment
Supply current monitoring
Battery monitoring
Buffer
Filter
Driver
Sample and Hold Circuit
SC70-6L
20030441
Top View
Order Number
LMV341MG, LMV341MGX
LMV342MM, LMV342MMX
LMV342MA, LMV342MAX
LMV344MT, LMV344MTX
LMV344MA, LMV344MAX
© 2003 National Semiconductor Corporation
DS200304
20030444
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LMV341/LMV342/LMV344 Single with Shutdown/Dual/Quad General Purpose, 2.7V, Rail-to-Rail
Output, 125˚C, Operational Amplifiers
March 2003
LMV341/LMV342/LMV344
Absolute Maximum Ratings
(Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Infrared or Convection Reflow
(20 sec.)
235˚C
Wave Soldering Lead Temp.
(10 sec.)
260˚C
ESD Tolerance (Note 2)
Machine Model
2000V
+
Temperature Range
± Supply Voltage
Differential Input Voltage
Supply Voltage (V
Operating Ratings (Note 1)
200V
Human Body Model
-V −)
5.5V
Output Short Circuit to V
+
Output Short Circuit to V
−
Storage Temperature Range
JA)
6-Pin SC70
(Note 3)
(Note 4)
−65˚C to 150˚C
Junction Temperature (Note 5)
−40˚C to 125˚C
Thermal Resistance (θ
150˚C
Mounting Temperature
414˚C/W
8-Pin SOIC
190˚C/W
8-Pin MSOP
235˚C/W
14-Pin TSSOP
155˚C/W
14-Pin SOIC
145˚C/W
2.7V DC Electrical Characteristics
(Note 10)
Unless otherwise specified, all limits guaranteed for TJ = 25˚C, V+ = 2.7V, V− = 0V, VCM = V+/2, VO = V+/2 and RL > 1MΩ.
Boldface limits apply at the temperature extremes.
Symbol
VOS
Parameter
Input Offset Voltage
Min
(Note 7)
Typ
(Note 6)
Max
(Note 7)
LMV341
0.25
4
4.5
LMV342/LMV344
0.55
5
5.5
Conditions
TCVOS
Input Offset Voltage Average
Drift
1.7
IB
Input Bias Current
0.02
IOS
Input Offset Current
IS
Supply Current
Shutdown Mode, VSD = 0V
(LMV341)
mV
µV/˚C
120
250
pA
100
170
230
µA
45pA
1µA
1.5µA
6.6
Per Amplifier
Units
fA
CMRR
Common Mode Rejection
Ratio
0V ≤ VCM ≤ 1.7V
0V ≤ VCM ≤ 1.6V
56
50
80
dB
PSRR
Power Supply Rejection Ratio
2.7V ≤ V+ ≤ 5V
65
60
82
dB
VCM
Input Common Mode Voltage
For CMRR ≥ 50dB
0
−0.2 to 1.9
(Range)
AV
Large Signal Voltage Gain
RL = 10kΩ to 1.35V
78
70
113
RL = 2kΩ to 1.35V
72
64
103
VO
Output Swing
RL = 2kΩ to 1.35V
24
60
95
RL = 10kΩ to 1.35V
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2
V
dB
60
95
26
5.0
30
40
1.7
5.3
30
40
mV
(Note 10) (Continued)
Unless otherwise specified, all limits guaranteed for TJ = 25˚C, V+ = 2.7V, V− = 0V, VCM = V+/2, VO = V+/2 and RL > 1MΩ.
Boldface limits apply at the temperature extremes.
Symbol
IO
Min
(Note 7)
Typ
(Note 6)
Sourcing
LMV341/LMV342
20
32
Sourcing
LMV344
18
24
Sinking
15
24
Parameter
Output Short Circuit Current
Conditions
ton
Turn-on Time from Shutdown
(LMV341)
VSD
Shutdown Pin Voltage Range
ON Mode (LMV341)
Max
(Note 7)
Units
mA
5
Shutdown Mode (LMV341)
µs
1.7 to 2.7
2.4 to 2.7
0 to 1
0 to 0.8
V
2.7V AC Electrical Characteristics
(Note 10)
Unless otherwise specified, all limits guaranteed for TJ = 25˚C, V+ = 2.7V, V− = 0V, VCM = V+/2, VO = V+/2 and RL > 1MΩ.
Boldface limits apply at the temperature extremes.
Symbol
Parameter
Conditions
Min
(Note 7)
Typ
(Note 6)
Max
(Note 7)
Units
SR
Slew Rate
RL = 10kΩ, (Note 9)
1.0
V/µs
GBW
Gain Bandwidth Product
RL = 100kΩ, CL = 200pF
1.0
MHz
Φm
Phase Margin
RL = 100kΩ
72
deg
Gm
Gain Margin
RL = 100kΩ
20
en
Input-Referred Voltage Noise
f = 1kHz
40
nV/
in
Input-Referred Current Noise
f = 1kHz
0.001
pA/
THD
Total Harmonic Distortion
f = 1kHz, AV = +1
RL = 600Ω, VIN = 1VPP
0.017
dB
%
5V DC Electrical Characteristics
(Note 10)
Unless otherwise specified, all limits guaranteed for TJ = 25˚C, V+ = 5V, V− = 0V, VCM = V+/2, VO = V+/2 and R
Boldface limits apply at the temperature extremes.
Symbol
VOS
Parameter
Input Offset Voltage
Min
(Note 7)
Typ
(Note 6)
Max
(Note 7)
LMV341
0.025
4
4.5
LMV342/LMV344
0.70
5
5.5
Conditions
TCVOS
Input Offset Voltage Average
Drift
1.9
IB
Input Bias Current
0.02
IOS
Input Offset Current
IS
Supply Current
Shutdown Mode, VSD = 0V
(LMV341)
> 1MΩ.
Units
mV
µV/˚C
200
375
pA
107
200
260
µA
0.033
1
1.5
µA
6.6
Per Amplifier
L
fA
CMRR
Common Mode Rejection
Ratio
0V ≤ VCM ≤ 4.0V
0V ≤ VCM ≤ 3.9V
56
50
86
dB
PSRR
Power Supply Rejection Ratio
2.7V ≤ V+ ≤ 5V
65
60
82
dB
VCM
Input Common Mode Voltage
For CMRR ≥ 50dB
0
−0.2 to 4.2
(Range)
3
4
V
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LMV341/LMV342/LMV344
2.7V DC Electrical Characteristics
LMV341/LMV342/LMV344
5V DC Electrical Characteristics
(Note 10) (Continued)
Unless otherwise specified, all limits guaranteed for TJ = 25˚C, V+ = 5V, V− = 0V, VCM = V+/2, VO = V+/2 and R
Boldface limits apply at the temperature extremes.
Symbol
AV
VO
Min
(Note 7)
Typ
(Note 6)
RL = 10kΩ to 2.5V
78
70
116
RL = 2kΩ to 2.5V
72
64
107
Parameter
Large Signal Voltage Gain
(Note 8)
Output Swing
Conditions
RL = 2kΩ to 2.5V
RL = 10kΩ to 2.5V
IO
Output Short Circuit Current
Max
(Note 7)
60
95
7
7
Sourcing
85
113
Sinking
50
75
ton
Turn-on Time from Shutdown
(LMV341)
VSD
Shutdown Pin Voltage Range
ON Mode (LMV341)
Units
mV
34
30
40
30
40
mV
mA
5
Shutdown Mode (LMV341)
> 1MΩ.
dB
32
60
95
L
µs
3.1 to 5
4.5 to 5.0
0 to 1
0 to 0.8
V
5V AC Electrical Characteristics
(Note 10)
Unless otherwise specified, all limits guaranteed for TJ = 25˚C, V+ = 5V, V− = 0V, VCM = V+/2, VO = V+/2 and R
Boldface limits apply at the temperature extremes.
Symbol
Parameter
Conditions
Min
(Note 7)
Typ
(Note 6)
Max
(Note 7)
L
> 1MΩ.
Units
SR
Slew Rate
RL = 10kΩ, (Note 9)
1.0
V/µs
GBW
Gain-Bandwidth Product
RL = 10kΩ, CL = 200pF
1.0
MHz
Φm
Phase Margin
RL = 100kΩ
70
deg
Gm
Gain Margin
RL = 100kΩ
20
en
Input-Referred Voltage Noise
f = 1kHz
39
nV/
in
Input-Referred Current Noise
f = 1kHz
0.001
pA/
THD
Total Harmonic Distortion
f = 1 kHz, AV = +1
RL = 600Ω, VIN = 1VPP
0.012
dB
%
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is
intended to be functional, but specific performance is not guaranteed. For guaranteed specifications and the test conditions, see the Electrical Characteristics.
Note 2: Human body model, 1.5kΩ in series with 100pF. Machine model, 0Ω in series with 200pF.
Note 3: Shorting output to V+ will adversely affect reliability.
Note 4: Shorting output to V- will adversely affect reliability.
Note 5: The maximum power dissipation is a function of TJ(MAX), θJA, and TA. The maximum allowable power dissipation at any ambient temperature is PD =
(TJ(MAX)–TA)/θJA. All numbers apply for packages soldered directly into a PC board.
Note 6: Typical values represent the most likely parametric norm.
Note 7: All limits are guaranteed by testing or statistical analysis.
Note 8: RL is connected to mid-supply. The output voltage is GND + 0.2V ≤ VO ≤ V+ −0.2V
Note 9: Connected as voltage follower with 2VPP step input. Number specified is the slower of the positive and negative slew rates.
Note 10: Electrical Table values apply only for factory testing conditions at the temperature indicated. Factory testing conditions result in very limited self-heating
of the device such that TJ = TA. No guarantee of parametric performance is indicated in the electrical tables under conditions of internal self heating where TJ > TA.
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4
SC70-6L
8-Pin MSOP/SOIC
20030441
Top View
14-Pin TSSOP/SOIC
20030452
20030451
Top View
Top View
Ordering Information
Package
6-Pin SC70
8-Pin MSOP
8-Pin SOIC
14-Pin TSSOP
14-Pin SOIC
Part Number
LMV341MG
LMV341MGX
LMV342MM
LMV342MMX
LMV342MA
LMV342MAX
LMV344MT
LMV344MTX
LMV344MA
LMV344MAX
Package Marking
Transport Media
1k Units Tape and Reel
A78
3k Units Tape and Reel
1k Units Tape and Reel
A82A
3.5k Units Tape and Reel
LMV342MA
LMV344MT
LMV344MA
5
95 Units/Rail
2.5k Units Tape and Reel
Rails
2.5k Units Tape and Reel
55 Units/Rail
2.5k Units Tape and Reel
NSC Drawing
MAA06A
MUA08A
M08A
MTC14
M14A
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LMV341/LMV342/LMV344
Connection Diagrams
LMV341/LMV342/LMV344
Typical Performance Characteristics
Supply Current vs. Supply Voltage (LMV341)
Input Current vs. Temperature
20030428
20030446
Output Voltage Swing vs. Supply Voltage
Output Voltage Swing vs. Supply Voltage
20030426
20030427
ISOURCE vs. VOUT
ISOURCE vs. VOUT
20030429
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20030430
6
LMV341/LMV342/LMV344
Typical Performance Characteristics
(Continued)
ISINK vs. VOUT
ISINK vs. VOUT
20030432
20030431
VOS vs. VCM
VOS vs. VCM
20030433
20030434
VIN vs. VOUT
VIN vs. VOUT
20030435
20030436
7
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LMV341/LMV342/LMV344
Typical Performance Characteristics
(Continued)
CMRR vs. Frequency
PSRR vs. Frequency
20030401
20030403
Input Voltage Noise vs. frequency
Slew Rate vs. VSUPPLY
20030404
20030402
Slew Rate vs. Temperature
Slew Rate vs. Temperature
20030422
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20030423
8
LMV341/LMV342/LMV344
Typical Performance Characteristics
(Continued)
THD+N vs. Frequency
THD+N vs. VOUT
20030425
20030424
Open Loop Frequency Over Temperature
Open Loop Frequency Response
20030421
20030420
Open Loop Frequency Response
Gain & Phase vs. CL
20030419
20030417
9
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LMV341/LMV342/LMV344
Typical Performance Characteristics
(Continued)
Gain & Phase vs. CL
Stability vs. Capacitive Load
20030448
20030418
Stability vs. Capacitive Load
Non-Inverting Small Signal Pulse Response
20030405
20030449
Non-Inverting Large Signal Pulse Response
Non-Inverting Small Signal Pulse Response
20030408
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20030406
10
(Continued)
Non-Inverting Large Signal Pulse Response
Non-Inverting Small Signal Pulse Response
20030409
20030407
Non-Inverting Large Signal Pulse Response
Inverting Small Signal Pulse Response
20030410
20030411
Inverting Large Signal Pulse Response
Inverting Small Signal Pulse Response
20030414
20030412
11
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LMV341/LMV342/LMV344
Typical Performance Characteristics
LMV341/LMV342/LMV344
Typical Performance Characteristics
(Continued)
Inverting Large Signal Pulse Response
Inverting Small Signal Pulse Response
20030415
20030413
Inverting Large Signal Pulse Response
Crosstalk Rejection vs. Frequency
20030416
20030454
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LMV341/342/344
ances, along with the ability of the shutdown pin to be
derived from a separate power source, make LMV341 a
good choice for sample and hold circuits. The sample clock
should be connected to the shutdown pin of the amplifier to
rapidly turn the device on or off.
Figure 2 shows the schematic of a simple sample and hold
circuit. When the sample clock is high the first amplifier is in
normal operation mode and the second amplifier acts as a
buffer. The capacitor, which appears as a load on the first
amplifier, will be charging at this time. The voltage across the
capacitor is that of the non-inverting input of the first amplifier
since it is connected as a voltage-follower. When the sample
clock is low the first amplifier is shut off, bringing the output
impedance to a high value. The high impedance of this
output, along with the very high impedance on the input of
the second amplifier, prevents the capacitor from discharging. There is very little voltage droop while the first amplifier
is in shutdown mode. The second amplifier, which is still in
normal operation mode and is connected as a voltage follower, also provides the voltage sampled on the capacitor at
its output.
The LMV341/342/344 family of amplifiers features low voltage, low power, and rail-to-rail output operational amplifiers
designed for low voltage portable applications. The family is
designed using all CMOS technology. This results in an ultra
low input bias current. The LMV341 has a shutdown option,
which can be used in portable devices to increase battery
life.
A simplified schematic of the LMV341/342/344 family of
amplifiers is shown in Figure 1. The PMOS input differential
pair allows the input to include ground. The output of this
differential pair is connected to the Class AB turnaround
stage. This Class AB turnaround has a lower quiescent
current, compared to regular turnaround stages. This results
in lower offset, noise, and power dissipation, while slew rate
equals that of a conventional turnaround stage. The output
of the Class AB turnaround stage provides gate voltage to
the complementary common-source transistors at the output
stage. These transistors enable the device to have rail-to-rail
output.
20030444
20030453
FIGURE 2. Sample and Hold Circuit
FIGURE 1. Simplified Schematic
SHUTDOWN FEATURE
The LMV341 is capable of being turned off in order to
conserve power and increase battery life in portable devices.
Once in shutdown mode the supply current is drastically
reduced, 1µA maximum, and the output will be "tri-stated."
The device will be disabled when the shutdown pin voltage is
pulled low. The shutdown pin should never be left unconnected. Leaving the pin floating will result in an undefined
operation mode and the device may oscillate between shutdown and active modes.
The LMV341 typically turns on 2.8µs after the shutdown
voltage is pulled high. The device turns off in less than 400ns
after shutdown voltage is pulled low. Figure 3 and Figure 4
show the turn-on and turn-off time of the LMV341, respectively. In order to reduce the effect of the capacitance added
to the circuit by the scope probe, in the turn-off time circuit a
resistive load of 600Ω is added. Figure 5 and Figure 6 show
the test circuits used to obtain the two plots.
CLASS AB TURNAROUND STAGE AMPLIFIER
This patented folded cascode stage has a combined class
AB amplifier stage, which replaces the conventional folded
cascode stage. Therefore, the class AB folded cascode
stage runs at a much lower quiescent current compared to
conventional folded cascode stages. This results in significantly smaller offset and noise contributions. The reduced
offset and noise contributions in turn reduce the offset voltage level and the voltage noise level at the input of the
LMV341/342/344. Also the lower quiescent current results in
a high open-loop gain for the amplifier. The lower quiescent
current does not affect the slew rate of the amplifier nor its
ability to handle the total current swing coming from the input
stage.
The input voltage noise of the device at low frequencies,
below 1kHz, is slightly higher than devices with a BJT input
stage; However the PMOS input stage results in a much
lower input bias current and the input voltage noise drops at
frequencies above 1kHz.
SAMPLE AND HOLD CIRCUIT
The lower input bias current of the LMV341 results in a very
high input impedance. The output impedance when the device is in shutdown mode is quite high. These high imped-
13
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LMV341/LMV342/LMV344
Application Section
LMV341/LMV342/LMV344
Application Section
(Continued)
20030443
FIGURE 6. Turn-off Time
LOW INPUT BIAS CURRENT
The LMV341/LMV342/LMV344 Amplifiers have a PMOS input stage. As a result, they will have a much lower input bias
current than devices with BJT input stages. This feature
makes these devices ideal for sensor circuits. A typical curve
of the input bias current of the LMV341 is shown in Figure 7.
20030440
FIGURE 3. Turn-on Time
20030439
FIGURE 4. Turn-off Time
20030447
FIGURE 7. Input Bias Current vs. VCM
20030442
FIGURE 5. Turn-on Time
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14
LMV341/LMV342/LMV344
Physical Dimensions
inches (millimeters)
unless otherwise noted
6-Pin SC70
NS Package Number MAA06A
8-Pin MSOP
NS Package Number MUA08A
15
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LMV341/LMV342/LMV344
Physical Dimensions
inches (millimeters) unless otherwise noted (Continued)
8-Pin SOIC
NS Package Number M08A
14-Pin TSSOP
NS Package Number MTC14
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16
inches (millimeters) unless otherwise noted (Continued)
14-Pin SOIC
NS Package Number M14A
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accordance with instructions for use provided in the
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Support Center
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LMV341/LMV342/LMV344 Single with Shutdown/Dual/Quad General Purpose, 2.7V, Rail-to-Rail
Output, 125˚C, Operational Amplifiers
Physical Dimensions
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